JPS58181379A - Digital signal recording system - Google Patents

Abstract

PURPOSE:To make the conversion of the number of scanning lines in a reproducer, by reducing each picture element data of a digital video signal to the number of prescribed quantizations and arranging the picture element data of two adjacent scanning lines in the same word. CONSTITUTION:An analog video signal 1 of picture information is modulated with a digital pulse to produce the digital video signal of picture element data forming a screen. Analog sound signals 30-32 of sound information are modulated with a digital pulse to produce the digital sound signal. Both the digital signals are synthesized in time series for recording. Each picture element data of the digital video signal is formed with the number of quantizations which are a half the sampling points of the digital sound signal. Further, the picture element data of the same sampling points of the two adjacent scanning lines are arranged on the same word transmitted in a period equal to the data transmission period of one sampling point of the digital sound signal for the surpose of recording.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital signal recording method, in which each pixel data of a digital video signal recorded on a recording medium in time series along with a digital audio signal is set to a predetermined quantization number, and The pixel data of the same sample point of two adjacent scanning lines are arranged and recorded in the same word, which is transmitted in a period equal to the data transmission period of one sample point of the above-mentioned digital and audio signals. It is an object of the present invention to provide a digital signal recording method that can easily convert the number of scanning lines in a reproducing device.

In recent years, the pulse code of video and audio signals has been changed! l
Digital video signals and digital audio signals obtained by digital pulse modulation such as (PCM) are recorded on a disc-shaped recording medium (hereinafter referred to as a "disc") as intermittent changes in bit strings, and changes in the intensity of light from the disc or Systems are being actively developed to detect changes in capacitance, read and reproduce the recorded green signal. Among these, a digital video signal related to color still image information is added as additional information to the digital audio signal. A recording method for digital audio discs is known in which audio data is recorded on the same track on the disc. Usually, a plurality of music programs are recorded on the same side of such a digital audio disc, and a digital video signal related to color still image information is recorded corresponding to each music program, but when this disc is played back, Music programs can be played using a universal playback system.

On the other hand, since the television system for playing back video signals is not universally accepted worldwide, in order to be able to play back in regions or countries where the television system differs from the television system for the video signal recorded on such a disc, it is necessary to As for the signal, it is necessary to convert it into a signal format that complies with the television system of the region or country in which it is to be reproduced and displayed. In particular, since the digital video signal mentioned above concerns color still images that play an auxiliary role to aid the imagination of the listener who listens to the playback of the digital audio signal, the above-mentioned disc is one of the world's television formats. It is desirable to have a universal system regardless of the differences, and to reproduce the signal format in accordance with each television system.

Among the world's television systems mentioned above, the current color signal transmission formats are the NTSC system, the PAm system, and the S
There are three ECAM systems, and each of these systems composes a color image signal from a luminance signal and two types of color difference signals, so the brightness signal and two types of color difference signals are digitally pulse modulated separately. Adopting a component encoding method that transmits data as a component allows for easy compatibility between the three methods mentioned above, and also allows for the RGB three methods that may appear in the future.
This is desirable because it has advantages such as good image quality when using a display monitor with a primary color signal input terminal, and especially the possibility of partial moving images in the case of the digital audio disc.

Therefore, the present invention has been made in view of the above points,
Further, the digital video signal is recorded in consideration of the ease of converting the number of scanning lines, and one embodiment thereof will be described below with reference to the drawings.

FIG. 1 shows a block system diagram of an embodiment of the main part of the system of the present invention. In the figure, reference numeral 1 denotes a video signal source such as a color television camera, a flying spot scanner, or a VTR, to which a TV synchronization signal from a TV synchronization signal generator 2 is supplied as necessary, and is used to generate a color still image to be recorded. The three primary color signals are taken out and supplied to the matrix circuit 3. The matrix circuit 3 has 625 scanning lines and a horizontal scanning frequency of 15.625 kHz.
Y) and (R-Y), and send these to the AD converter 4.
5 and 6 separately. On the other hand, the output TV synchronization signal of the TV synchronization signal generator 2 is output from the clock generator 7.8.1.
2 and 13, respectively.

The AD converter 4 receives a luminance signal Y with a band of about 4.5 MHz,
After being sampled at a sampling frequency of 9 MHz using a 9 MH2 clock from a clock generator 7, it is quantized using an 8-bit digitization number and converted into a digital luminance signal, and this signal is supplied to a memory 9. The AD converter 5 converts one of the color difference signals (B-Y) and (R-Y) into a band approximately a fraction of the luminance signal in consideration of well-known human visual characteristics.
B-Y) is sampled at a sampling frequency of 2°25MHz based on a 2.25MH2 clock signal from the clock generator 8, and then quantized with an 8-bit quantization number to convert it into a digital color difference signal. is supplied to the memory 10. Further, the AD converter 6 converts the color difference signal (R-Y) into a digital color difference signal with a sampling frequency of 2.25 MHz and a quantization number of 8 bits, similar to the AD conversion 15, based on the clock signal from the clock generator 8. Then, this signal is stored in memory 11.
supply to.

The memory 9 writes the digital luminance signal for one frame, for example, in response to the output pulses of the memory write controller 12, and sequentially performs read operations in response to the output pulses of the memory read controller 14. The digital luminance signal supplied to this memory 9 is divided into four pixels per scanning line, for example, four
This is a digital luminance signal at 56 sample points (456 pixels in the horizontal direction). In other words, a luminance signal with a horizontal scanning frequency of 15.625kHz with 625 scanning lines,
When sampling at a sampling frequency of 9 MHz, the sample points of one scanning line are 576 (= 9 x 106 / 15625)
However, among the video signals shown in horizontal scanning period units in FIG. Since each synchronization signal and color burst signal can be added in the reproducing device, it is assumed that digital luminance signals are supplied to the memory 9 at 456 sample points in the first half video period VT. Further, the digital luminance signal read out from this memory 9 is a digital luminance signal regarding 512 scanning lines containing image information among 625 scanning lines, and its sampling frequency is 94.5k.
It is read out at Hz (or 88.1kHz) with a quantization number of 8 bits.

Furthermore, the digital color difference signal for, for example, one frame is written into the memory 0.11 based on the writing control signal from the memory write controller 3, and the stored data is read out based on the output readout control signal from the memory read controller 4. It will be done. The sampling frequency of the digital color difference signal supplied to memory 0.11 is the digital luminance! Since the signal frequency is 2.25 MHz, each scanning line has 114 sample points (= 456/4
) digital signals, which are memory 0.1
1 to 94.5 kHz (or 88° 2 kHz) and quantization number of 8 bits as first and second digital color difference signals. This first and!
Similar to the digital luminance signal, the digital color difference signal No. 2 relates to image information of 512 scanning lines. Memory 9.1
Each output digital signal of 0 and 11 is supplied to a switching circuit 15, respectively.

On the other hand, signals generated each time the still image signal to be recorded is switched are input to the input terminal 16, and the header signal generator 1
7. As will be described later, the header signal generator 17 generates a 16-bit header signal, which is a collection of signals and codes that make up part of the header, and stores this in the memory 18.
supply to.

The memory 18 stores the header signal at a sampling frequency of 47.25 kHz (or 4
4.1kHz) is read out with a quantization number of 16 bits and supplied to the switching circuit 15.

The switching circuit 15 switches each digital signal from the memories 9, 10, 11, and 18 in a predetermined order and outputs the signals shown in FIGS. 3 to 5.
A digital video signal having a signal format as shown in the figure is generated and supplied to a digital recorder 19 where it is recorded.

Note that a read control signal is outputted from the memory read controller 14 in synchronization with clock number I8 from the digital recorder 19. .

Next, the signal format of the above digital video signal will be explained in more detail. The digital video signal taken out from the switching circuit 15 includes a part of a 12-word header and, for example, 684 words for 2H (H is a horizontal scanning period).
A component encoded digital video signal section of
It is a signal that is synthesized alternately in time series, and a signal transmission end signal (hereinafter also referred to as rEOD signal) is added to the last word, and the image information for one frame is When transmitted, as shown in Figure 3, H1 to H8
286 (however, H2Se to H3 is not shown)
Some of the 86 headers and ■1~V286 (but V3~
A total of 199,057 words of digital video signals are recorded, consisting of -4286 video signal portions (285 is not shown) and one word of EOD signal (EOD). Therefore, this digital video signal for one frame consists of one block of signals shown in FIG. 8, which will be described later.
When one word is transmitted on a 16-bit channel,
Since the signal period of one block is selected to be equal to the reciprocal of the sampling frequency of the header signal, when the sampling frequency is 47.25 kHz, the signal is transmitted in approximately 4.21 seconds.
When the frequency is 44.1kHz, it is transmitted in approximately 4°51 seconds.

The above header portions H1 to H286 form the main part of the present invention, and one embodiment of the signal format thereof is as shown in FIG. In the figure, the vertical direction shows the bit array, with the upper side being the MSB (most significant bit) and the lower side being the LSB (least significant bit).
bits), and the horizontal direction indicates time. ■ indicates the transmission time of one word. A synchronization signal @20 is placed in the first word of the header signal to indicate the start of the header signal, and the upper 8 bits have a hexadecimal value of 1FF, and the lower 8 bits have a hexadecimal value of 1FF. The value at is selected as rFEJ. Therefore, when the synchronization signal 20 is expressed as a binary number, its upper 8 bits are all "1" and its lower 8 bits are r11111110J.

Here, the values rFFJ and rFEJ of the synchronization signal 20 are:
This value is assigned only to the synchronization signal in the digital video signal, and when these values exist in the video signal section V1 to 286, they are changed to rFDJ in advance in the recording system shown in Figure 1. If the playback device described later mistakenly identifies it as a synchronization signal, the value "F" indicates the brightest image data of the video signal, but normally this image data and the slightly darker image data rFEJ hardly appear.
There is no practical problem in assigning these values to the synchronization signal 20.

Various identification codes are transmitted in the second word of the header signal following the synchronization signal 20 described above.

First, an image type identification code indicated by rMODEJ is placed in the upper 4 bits. This code determines whether the digital video signal to be recorded is a standard still image (the above description of FIG. 1 was based on the example of a standard still image) or a moving image using a run-length code. For example, high definition with 1125 scanning lines,
This is a code that indicates whether the image is a high-quality still image. Next, a transmission channel identification code indicated by rIP/2PJ is placed in the fifth upper bit. This code is a code that identifies which channel out of the four transmission channels described below the digital video signal is transmitted through, and when its value is "1", it is IP.

In other words, it indicates that the signal is transmitted on the 4th channel (this case will be explained as an example in this embodiment), and when it is "0", it is 2P, that is, it is transmitted on a total of 2 channels, the 4th channel and the 3rd channel. shows. In the case of 2P, the type of image of the digital video signal transmitted in the fourth channel and the third channel (for example, wind*iir,
Portraits, performance scenes, etc.) are made different from each other, and viewers can select and enjoy their favorite image. Alternatively, the same image may be transmitted by one word each in the fourth channel and the third channel, that is, equivalently, the sampling frequency is doubled.

Next, the upper sixth word of the second word of the header signal shown in FIG.
An image information amount identification code (not shown as rFR/FLJ) is arranged at the th bit, and this identifies whether the digital video signal to be transmitted is for one frame or one field. When the value is "1", it is for one frame, and when it is rOJ, it is for one field. Is the digital video signal transmitted frame by frame?
Since the signal format of the video signal portion (to be described later) differs depending on whether it is transmitted in units of one field, the playback device detects this and captures the image signal according to the signal format at that time.

Also, the next 1 bit of this image information amount identification code is rA.
A screen transmission identification code indicated by /PJ is placed and the value is “1”.
'' indicates that a digital video signal of a still image that should be displayed on the full screen is being transmitted (so-called full screen transmission).
, and when the value is "0", it is displayed on a part of the screen, indicating that a so-called partially rewritten digital video signal is being transmitted.

Furthermore, the "1" shown in Fig. 4 is a binary "1", and the values of each code placed up to the upper seventh bit are all "0", and furthermore, the eighth bit is also "1". 0", the EOD signal shown in FIG.
Since both bits and lower 8 bits are set to all "0", it may be erroneously detected as this EOD signal, so "1" is placed in order to prevent this.

Furthermore, in Fig. 4, rs and EJ indicate 2-bit special effect codes, which are displayed with special effects such as fade-in, screen change from the top or left side of the screen, etc. on the still image displayed on the screen. This is a code to identify the case. The next two bits of the above special effect codes Is and EJ are the scanning line number conversion code shown as r6LMODEJ, and the next two bits are the picture type identification to identify the type of program shown as IP and GJ. The code r6LMODEJ for converting the number of scanning lines has a number of scanning lines of 625.
When converting a digital video signal using this method to a method with 525 scanning lines during playback, the image information of 6 scanning lines can be simply converted into image information of 5 scanning lines to reduce the number of scanning lines. This is a code that indicates one of the four types of mixing ratios required when performing conversion. That is, when performing the above conversion of the number of scanning lines, the image information of the first to sixth scanning lines of the 625 scanning line system shown as 1 to 6 in FIG. The number of scanning lines is 5, shown as 1 to 5 in Figure (B).
Image information of the first to fifth scanning lines of the 25-line method is created, but the image information of the first scanning line (11-1 of the first field) of the 525-line method To create a 625-line system, the first scanning line (1st H of the first field) and second scanning are each multiplied by 1 bit, and then multiplied by 1 bit in the direction of the LSB. Since it is a shift sum, the first digital data obtained by shifting the digital data of the first scanning line of the 625 scanning line method one bit at a time in the LSB direction, and
By adding the second digital data obtained by shifting 2 bits at a time in the B direction, image information of -p of the image information of the first scanning line is generated, and furthermore, the image information of -p is generated by adding the image information of 6 scanning lines to this.
The digital data of the second scanning line of the 25-line method is transferred to the LS.
By adding the digital data obtained by shifting 2 bits each in the B direction, image information of the first scanning line of the 525 scanning line system is obtained.

Hereinafter, in the same manner as above, as shown in FIG. It is obtained by mixing the image information of the second and third, third and fourth, fourth and fifth, fifth and sixth scanning lines of the 625-line system at a predetermined mixing ratio.These mixing ratios As shown in FIGS. 6(A) and 6(B), the mixing ratio is given in four different patterns.
By providing the code as ODEJ, it is possible to easily convert the reproduction device to a 525 scanning line system.

Note that if this code r6LMODEJ is not given, in the case of the n-th scanning line, it is necessary to calculate the mixing ratio from the remainder when dividing this by 6.

Next, the picture type identification codes rP and GJ are used to transmit a digital video signal of a normal image on the fourth channel, for example, when transmitting digital video signals independently of each other using two channels, the 41st channel and the third channel. Assuming that the third channel transmits a special image in which digital video signals of several types of images are synthesized in time series, how many types (up to 4 in this case) are transmitted on this third channel? (type) indicates the value of the category number assigned to each image. Each image transmitted through this third channel requires display continuity,
The image is one in which it is inconvenient to switch to a different type of image in the middle of display (for example, a musical score, a landscape, an illustration, a performer, etc.),
The above-mentioned two-type identification codes IP and GJ indicate category numbers assigned according to the types of these images.

Therefore, if the viewer selects to play back images from the third channel and specifies a desired category number, only the images in that category number will be played continuously, and the images in other category numbers will be played back. will no longer be interrupted.

Further, in FIG. 4, the 1-bit codes not shown as rB19WJ and rB19RJ are write designation codes and read designation codes for two frame memories in the playback device, which will be described later, and both are "0" (or "1"). ), the pixel data of the digital video signal is loaded into the first (or second) frame memory, and the stored data is read out and displayed on the screen. This means changing the content of the image while displaying it, resulting in
It is not possible to display a video on a part of the edge of a still image.

On the other hand, when fB19WJ is [0] and rB19R1 is "1", pixel data is written in the first frame and pixel data read out from the second frame is displayed. After the writing operation of the room memory is completed, the display screen is switched from the second frame memory to the first frame memory by the OD signal.

When rB19WJ is "1" and FBI9RJ is "0", the pixel data read from the first frame memory is displayed while writing the pixel data to the second frame memory, contrary to the above.

Next, the third word ['' to the sixth word of the header signal shown in FIG. 4 are indicated by 83 to 818 respectively.
21a, 22a, 23a and 24a are arranged respectively, and -F position 8 bits 1~ and lower 8 bits 2 of each word of the video signal section transmitted following the header signal are arranged.
1. The address signal for the main circuit for pixel data (pixel simple value) is shown below. ．． Nowadays, the number of scanning lines of Kasi preview signals in the world is 625 or 525, and the digital video signal in the present invention is actually a time-series composite signal of pixel data of 572 scanning lines containing image information. However, since it is transmitted using a 625-scanning-line method, when playing back using a 525-scanning-line method, the number of scanning lines is converted in the playback device as described above, and then stored in the memory circuit. . Therefore, this memory circuit address signal has different values for two pixel data, the upper 8 bits and lower 8 bits of one word, and different values for the 625 scanning line system and the 525 scanning line system. Four address values would be required. Here, address signal 2
1a indicates the 7 address value of the upper 8 bits of pixel data of one word of the video signal section in the 625 line method, address signal 22a is the address value of the lower 8 bits of pixel data of the 625 line method, and 23a indicates the address value of the pixel data of the lower 8 bits of the 625 line method. The address value 24a of the upper 8 bits of ms data is assigned to indicate the address value of the lower 8 bits of pixel data in the 525-line system.

The seventh to twelfth words of the header signal shown in FIG. 4 have the same configuration as the first to sixth words described above, and the direction 111 signal 25 of the seventh word is synchronized. The upper 8 bits and lower 8 bits compared to signal 20
The difference is that the hexadecimal value of both bits is rFFJ (), and the other various codes of the 8th word and the address signals 21b, 22b, 23b, 24b are the same as that of the 2nd word. various]-code and address signal 21a
, 22a.

The same content as 23a and 24a is selected. This is due to the following reason. As will be described later, the digital signal recorded on the disk 40 shown in FIG. 7 includes error correction signals (P, Q, not shown in FIG. Most of the errors that occur are corrected, but there are rare cases where they cannot be corrected. In this case, the data of the digital audio A signal is corrected using an interpolation circuit, etc., and the data of the digital video signal is corrected by using the fact that adjacent pixel data often have similar values. There are also fewer problems with correction C using pixel data.

However, if there is no data correlation between adjacent words such as in a header signal, it is difficult to perform the above correction, and if the contents of the header signal are not transmitted, the digital video signal immediately after it is Therefore, for example, two days' worth of pixel data will be missing. Therefore, in order to avoid these inconveniences, some information in the header is sent twice as shown in Figure 4.
Even if the first half of the header signal part is not regenerated on the transmission path,
The second half of the header signal portion is used to capture pixel data. Note that since each ring of the synchronization signal 20, 25 is made different, it is possible to identify whether the synchronization signal is the first half header signal portion or the second half header signal portion.

Next, a video signal section V, which is the main part of the present invention, shown in FIG.
To explain the signal formats of V1 to V286, FIG. 5 shows an embodiment of the signal format of the video signal section V1. In this figure, the vertical direction shows the hit arrangement, the upper side shows M and 8B, the lower side shows the LSB, and the horizontal direction shows time, as in FIGS. 3 and 4. In this embodiment, the 286 video signal sections V1 to 286 each have 68
4 words (as mentioned above, each video signal section has pixel data of one scanning line among the pixel data of adjacent scanning lines arranged in the upper 8 bits,
Pixel data of the other scanning line is placed in the lower 8 bits and transmitted. Therefore, the signal format of the first video signal portion V1 is as shown in FIG.
The digital video signal sequence of each sample point of the first scanning line (111th point of the first field) located at position R1- in the screen is arranged (that is, a plurality of bits are arranged in a matrix to form one screen). The pixel data from the first row of pixels is arranged), and the lower 8 bits of each word contain each sample of the second scan line (first H of the second noel). Digital digital signal sequence of points (
In other words, the self-system data from the second line (self-system data) is arranged.

In addition, in Fig. 5, Y O-Y 455 (however, Y1
0 to Y455 are shown as t!゛) number indicates each arrangement position from the 1st sample point to the 465th sample point of the digital luminance signal of the 1st scanning line, Y456 to '1/911 (however, Y4
66 to Y911 (not shown) indicate the respective arrangement positions of the digital luminance signal of the second scanning line from the is-th main point to the 4561jA-th main point. Also (RY)0~. (RY)
113, (B-Y)O~(B-Y) 113 (
However, R-Y) 2~(RY) 113 and (B
-Y) 2~(B-Y) 112 is not shown)
are the digital color difference signals (R-Y) of the first scanning line, (B-
Each arrangement position from the first sample point to the 114th sample point of Y) is shown.

Furthermore, (RY) 114 to (RY) 227. (B-
Y) 114 ~ (B - Y) 227 (just
R-Y) 116 to (R-Y) 227 and (B
-Y) 116 to (B-Y) 226 are not shown) are the digital color difference signals (R-Y) of the second scanning line, (
B-Y) from the 141st point to the 114th sample point are shown. Therefore, the video signal section V1 consists of a group of 2H worth of pixel data of the first and second scanning lines, including pixel data of four sample points of the digital luminance signal and one sample point of each of the two types of digital color difference signals. It is a signal format in which 6 pixel data consisting of pixel data is regarded as one unit, and is repeatedly transmitted for each unit. Note that the video signal sections V2 to 286 also have similar signals such as Vl. It consists of a format.

Note that the video signal sections V1 to V1 as shown in FIGS. 3 and 5. V
Each of 286 consists of pixel data of two adjacent scanning lines, and when transmitting a digital video signal for one frame, as described above, the nth scanning line of the first field (where n is a positive This is an integer, in this case 1 to 286) and the second field's ``1st scanning line double gator.On the other hand, when transmitting a digital video signal for one field, the video signal part is 14.
2m-1 of the same field.
It consists of pixel data of a scanning line (plow is a positive integer) and a second IIl scanning line. In this way, the pixel data of 62 adjacent scanning lines are arranged in the same video signal section, taking into consideration the case where the number of scanning lines is converted from a 625-line system to a 525-line system. This is to make it easier for people to get annoyed. Note that the FOD fA number is 16 bits all fO,1, but in order to prevent it from being erroneously detected as this EOD signal, the video signal parts v1 to v28 are
The value of each word of 6 is 1 if the A rule becomes ``0''. S
It is changed to another value close to all "0" such that only "B" becomes "11".

Next, a recording system for recording a digital video signal having a signal format as shown in FIGS. 3 to 5 on a disk in time series along with a digital audio signal will be explained.

The digital video signal is transmitted on one or two channels of the total four channels, and the other three or two channels are transmitted.
A digital audio signal is transmitted through a channel transmission path, and here, an example will be explained in which a digital video signal is transmitted through one channel, and a digital audio signal is transmitted through three channels.

FIG. 7 shows a block system diagram of another essential part of the system of the present invention. In the figure, the same components as in FIG.
Channel A is a 7 channel analog, which is better than the conventional 2 channel A.
Real image localization of the central sound source and expansion of the listening range, which was not possible with 7-channel stereo systems, can be achieved. Further, 33 is a start signal input terminal, and 34 is an input terminal for a cue signal generated each time the music program of the three channels of analog audio signals is switched from the previous music program to another music program.

Here, on a disk 40, which will be described later, digital signals with a sampling frequency of 47.25, 1z, and a quantization number of 16 bits are recorded in time series on one track for 4 channels as an information source for one channel. Assuming that, the above three channels of analog audio signals are converted to a sampling frequency of 47.2 by the AD converter 35 for each channel.
The signal is sampled at 5 kHz, converted into a digital A-dio signal (PCM audio signal) with a quantization number of 16 bits, and supplied to the signal processing circuit 37. Also, at the same time as C, the digital recorder 19 (the third being played)
A digital video signal having a signal format as shown in the figure has a sampling frequency of 47.25 kHz.

The signal is quantized at 16 bits and then supplied to the signal processing circuit 37. Further, the start signal coming into the input terminal 33 and the cue signal coming into the input terminal 34 are respectively supplied to a control signal generation circuit 36, where they are sent to the control signal generating circuit 36 as shown in FIG. 9 below. l#
! generates a control signal for the configuration. this! The IJ m signal is a signal used for position control (random access) of the pickup reproducing element such as the reproducing needle 74, and is supplied to the signal processing circuit 37 described above.

The signal processing circuit 37 rearranges these 16-bit input digital signals and control signals of a total of 4 channels and A7 channels from parallel data to serial data, and also divides the digital signals of each channel into predetermined intervals. and interleave and time-division multiplex them. Then, an error code correction signal, an error code detection signal, and a synchronization signal bit indicating the beginning of a block (frame) are added to the history to generate a recording signal.

FIG. 8 is a diagram schematically showing an example of one block (one frame) of the recording signal generated as a result of signal processing by the signal processing circuit 37. One block i is composed of 130 bits. The repetition frequency is the same as the sampling frequency, for example, 47.25kl-1z. 5YNC is a 10-bit fixed pattern synchronization signal bit indicating the start of a block, and ch-i to Ct+-3 are each one of the above three channels.
6 bits 1~ digital audio signal, Ch-4 is 16 bits 1 reproduced from the above 1 digital recorder 19
Each multiplex position of one word of the digital video signal of ~ is shown. P and Q shown in FIG. 8 are 16-hit error code correction signals, for example, H-Wt (f)W, ・KO)W, t■W4
Otsu 1 no (1), (2) in formula w,, Wz, w,,
W4 is each 16-bit digital signal of Ch-1 to C, m-4 (usually digital signals in different blocks), ■ is an auxiliary matrix of a predetermined polynomial, and O is the modulus of 2 for each corresponding bit. Further, in Fig. 8, CRC is a 23-bit error code detection signal, and is a signal for ch-1 to ch-4 arranged in the same block.
, P, and Q, for example, Xzz
This is the 23-bit remainder obtained when dividing by the generator polynomial equal to 1. During playback, the signal from the 11th bit to the 129th bit of the same block is divided by the above generator polynomial, and the resulting remainder is When it is zero, it is used to detect -4 as there is no error. Furthermore, in Figure 8, A
dr is the control signal, which disperses each bit data,
One bit is transmitted in one block, and for example, all bits of the control signal are transmitted in 126 blocks (that is, the control signal is composed of 126 bits).

Therefore, when the rotational speed of the disk 40 is 900 rpm, 3150 blocks are recorded and reproduced per disk rotation, so the above 126-bit illll m1ll signal is recorded and reproduced 25 times during the disk rotation period. become.

FIG. 9 schematically shows an example of the structure of the above control signal.

The total 126-bit control signal is composed of a 42-bit first chapter code CP-1, a 42-bit second chapter code CP-2, and a 42-bit time code TC. The first chapter code CP-1 includes a 17-hit synchronization signal, a 4-bit mode signal,
The 1-bit signal obtained by modifying the chapter signal to 8-bit 1, the 12-bit chapter address, and the signal bits from the mode signal to the rich setter local address by modulo 2. The second chapter CP-2 also differs only in the value of the synchronization signal; other than that, the first
It has the same configuration and the same structure as -i. The above mode signal is a signal indicating the type of digital signal of 4 channels recorded on the disc 40, for example, "11
00'', a 3-channel digital audio signal and a 1-channel digital video signal are recorded, and when it is a 4-channel digital A-1'io signal,
Two types of S7 channel digital A-D A signals have been recorded, and history says, ``At the time of 1111J, 2f.
Channel f indicates that two channels of digital A-A signal and digital video signal are recorded.

The chapter signal is a signal indicating the number of the recorded music program from the signal recording start position on the disc 40.

Further, the time hood TC shown in FIG. 9 receives, for example, a 17-bit synchronization signal and the first and second chapter codes CP-
1. Similar to the mode signal in CP-2, 4 indicates the type of 4-channel digital signal recorded on the disc 40.
a mode signal of 16 bits, a time identification code of 16 bits indicating the position of the recorded music program on the disk 40 in terms of the total time from the signal recording start position, and an increment of -1 for each revolution of the disk 40; It consists of a 4-bit track number code that indicates a value from 0 to 14 in binary code, and a 1-bit parity code. The above 5ill identification code is expressed in minutes and seconds, with the minimum 11th being 1 second, whereas if the disk 40 rotates at 900 rpm, it will rotate 15 times per second. Even if the identification codes have the same value, the music program recording position can be identified every revolution of the disk 40 by the track number.

The signal processing circuit 37 outputs one block [1 block 130] shown in FIG.
A bit digital signal is serially extracted block by block and supplied to the modulation circuit 38 shown in FIG.
The MH2 carrier wave is frequency modulated to produce a frequency modulated wave signal. This frequency modulated wave signal is recorded on the disk 40 by a recording device 39 using a laser beam or the like. .

When the disc recording method previously proposed by the present applicant is applied, the above-mentioned recording device @39 has a configuration as shown in FIG. 10. In the figure, a laser beam emitted from a laser light source 41 undergoes drift and noise removal by an optical modulator 42, is reflected by a reflecting mirror 43, and is split into two optical paths by a half-missie 44. One of the divided laser beams is sent to an optical modulator 45 where it is input to an input terminal 46 as an output frequency modulated wave signal of the modulation circuit 38 and a third tracking control reference signal f p3 to be described later.
is modulated into a first modulated light beam. The other divided laser beam is transmitted to the optical modulator 47 by a first or second tracking control reference signal fp1 or fp2, which will be described later, which alternately enters the input terminal 48 every rotation period of the recording master 49. It is modulated into a second modulated light beam.

The first modulated light beam is reflected by the reflection ali 50 and its optical path is changed by the cylindrical lenses 51 and 52 . By passing through an information recording optical system consisting of a slit 53 and a convex lens 54, the light is shaped into a rectangular shape above the recording master disk 49. On the other hand, the second modulated light beam is transmitted through a convex lens 55. A tracking recording optical system comprising a slit 56 and a convex lens 57 shapes the light into a circular shape on the recording master 49, and then the optical path is changed by a reflecting mirror 58.

The first and second modulated light beams, each shaped into a desired shape, are combined onto substantially the fiil-optical axis 1 by a polarizing prism 59, and then pass through a half mirror 6o and pass through a prism 6.
The optical path is changed by slit 62. The first modulated light beam passes through a recording lens 63 onto a recording master 49 on which a photosensitive agent layer 65 is formed on a glass substrate 64.1.
6, and a second modulated light beam 67.
The beam is then irradiated in a circular shape.

The recording source 1149 is disk-shaped and is rotated synchronously at a constant speed.The light reflected from the Harno mirror 60 is applied to the signal monitoring system 68, and the light reflected from the prism 61 is sent to the monitoring optical system 69. Added. The distance between the two modulated light beams on the recording master 49 is measured by a monitoring optical system 69, and the deviation is monitored by a signal monitoring system 68.
The misalignment is corrected by moving the cylindrical lens 51 in the vertical direction in the figure.

The recording source 1149 is subjected to a known development process (1) and (1) to create a standby disc. The disk 40 copied by this standby disc contains the aforementioned 3 channels A7 digital audio signal and the 1 channel digital video signal in the signal format shown in FIGS. 3 to 5, in the signal format shown in FIG. 8. A spiral main track in which frequency modulated waves of signals synthesized in time series in block units are recorded as intermittent bit strings, and approximately midway between each track center line of adjacent main tracks. , burst-shaped first and second tracking control reference signals fp1 of a single frequency existing in a band lower than the band of the frequency modulated wave alternately every disk rotation period.
A sub-track recorded by a bit string in which f p2 and f p2 are intermittent is formed, and further f p1, f p2
A third tracking control reference signal fp3 is recorded on the main track of the switching connection portion. Further, this disk does not have a guide groove for tracking the playback needle, and has an electrode function.

As described above, according to this embodiment, the video signal parts v1 to V286 of the digital video signal recorded together with the digital audio signal each consist of pixel data groups of two adjacent scanning lines, and further include the digital luminance signal. Next to the four pixel data of , one pixel data of each of the two types of digital color difference signals are arranged in time series to constitute one unit, and the total number of units in each scanning line is a multiple of 6.114 (684 words), and the first divided signal of each scanning line contains the first pixel data (YO1Y4) of that scanning line.
56, etc.), and the pixel data of the scanning lines from the top of the screen are sequentially transmitted and recorded on the disk 40.

Next, the reproduction iim of the digital signal recorded on the disc 40 according to the method of the present invention will be explained.

FIG. 11 shows a block diagram of an example of a digital signal reproducing device. In the figure, the disk 40 is a turntable (
(not shown) and are synchronously rotated at 900 rpm. As shown in FIG. 12, on the disk 40, there is a main track with a track width TW and an I-rack pitch TP, in which a flat surface 70 and a bit 71 are repeated, and a main track in which a flat surface 70 and a bit 2 are repeated. Reference signal for dragging control f p1 recording sub-track and flat surface 7
As mentioned above, the tracking control reference signal f and the p2 recording sub-track are formed by repeating the pit 73 and the tracking control reference signal f, respectively. Forced to slide.

The regeneration meter 74 is a cantilever 75 as shown in FIG.
A permanent magnet 76 is fixed to the base side of the other end of the cantilever 75 . The portion of the cantilever 75 to which the permanent magnet 76 is fixed is surrounded by a tracking coil 77 and a jitter correction coil 78 which are fixed to the reproduction device. The tracking coil 77 generates a magnetic field in a direction perpendicular to the direction of the magnetic field of the permanent magnet 76, and moves the cantilever 75 in either the track width direction or the other direction depending on the polarity of the tracking error signal from the tracking servo circuit 79. - Displace the person with displacement noodles according to his personality.

A resonant circuit whose resonant frequency changes in response to changes in capacitance in accordance with intermittent pit rows, and a constant frequency set in this resonant circuit A circuit for applying voltage, a circuit for detecting the amplitude of a high-frequency signal whose amplitude changes according to a change in the capacitance from the resonant circuit, and a circuit for pre-amplifying the high-frequency signal (reproduction signal) subjected to the amplitude detection. pickup circuit 8o
The high frequency reproduction signal extracted from the FM demodulation circuit 8
1, and here the main information signals of the main track (in this case, digital audio signals and time-series synthesized digital video signals) are respectively demodulated, while a part is branched and supplied to a tracking servo circuit 79. be done.

The tracking servo circuit 79 detects the first signal from the reproduced signal.
to third tracking control reference signals r pl to f
p3 is frequency selected and extracted, both reference signals f pi,
A tracking error signal obtained by differentially amplifying the envelope detection output of f p2 is output to the tracking coil 77. However, r pl, f p for the main track
Since the recording positional relationship of 2 is switched every one rotation period of the disk 40, the tracking polarity is switched every one rotation period of the disk 40 by the switching pulse generated based on the detection output of the tracking control reference signal fp3. . The tracking servo circuit 79 controls the tracking coil 77 so that when a kick instruction signal is received at the input terminal 82, the playback needle 74 is forcibly moved in the track width direction by one track pitch or more.
to drive.

On the other hand, the demodulated digital signal taken out from the FM demodulation circuit 81 is applied to the decoder 83, where it is MFM-decoded and converted into a time-series composite signal in the signal format shown in FIG. The beginning of a signal block is detected, the serial signal is converted into a parallel signal, and further error detection is performed. Only when an error is detected, the error signal is corrected and restored using the error code correction signals P and Q. In this way, each of the three channels of the 16-bit 4-channel digital signal is corrected and restored as necessary to be error-free and returned to the original order before the signal arrangement was interleaved. The 16-bit digital audio signal is
The signals are converted into analog audio signals by the DA converter in the decoder 83 and then output to output terminals 84, 85 and 86, respectively. Further, the pickup control signal is output to a predetermined circuit (not shown) for high-speed position search and the like.

On the other hand, the digital video signals of the signal formats 1 to 1 shown in FIGS. 4 and 5 that are reproduced in chronological order in the fourth channel are supplied to the scanning line number conversion circuit 87 shown in FIG. Figure 6 (A).

The number of scanning lines is 6 based on the operating principle explained with (B).
The 25-line system is converted to the 525-line system. Here, as mentioned above, in the digital video signal, the pixel data that is synthesized in time series is sequentially synthesized from the top scanning line of the screen (for example, in the case of one frame transmission, the first scanning line of the first field, the second field 1st scan line of 1st field, 2nd scan line of 1st field
(scanning line, second scanning line of the second field, third scanning line of the first field, etc.), so
The above conversion of the number of scanning lines can be easily performed. Furthermore, as shown in Fig. 3, the digital video signal contains 62 adjacent words in the same word.
Since the pixel data of the scanning line of the book is transmitted, the number of times of memory writing and reading can be reduced in the calculations necessary for the above-mentioned scanning line number conversion.

This scanning line number conversion circuit 87 converts NTSC as shown in FIG.
This circuit is required only for a playback device that plays back and outputs an analog color video signal compliant with the 625-scanning-line PAL system and an analog color video signal that conforms to the SECAM system. It is a circuit. However, depending on the playback device, a changeover switch is provided to change the input/output of the scanning line number conversion circuit 87, and the circuit 87
It may be possible to switch between operating and non-operating. The output pixel data of the scanning line number conversion circuit 87 is sent to the memory 94 or 9 by the switch circuit 88, and the digital video signal, which is sequentially and time-sequentially extracted from the decoder 83 in the signal format shown in FIG.
The signal is also supplied to a header signal detection circuit 91 and a memory write controller 92, respectively. The synchronization signal detection circuit 89 detects the synchronization signal 20 or 25 shown in FIG. 4 and the EOD signal in the header signal, and supplies the detection signal to the i control circuit 90. The header signal detection circuit 91 discriminates each ]-code in the header signal shown in FIG. 4 and supplies it to the control circuit 90.

The control circuit 90 is supplied with the synchronization signal detection signal and each code detection signal of the header signal, and furthermore, the control circuit 90 is supplied with the above-mentioned synchronization signal detection signal and each code detection signal of the header signal, and furthermore, by operating an external switch etc. is recorded, a signal specifying (■ may be destroyed at will) is supplied from the input terminal 93, and these input signals are discriminated and deciphered to the scanning line number conversion circuit 87 and the switch circuit 88. , memory write controller 92, switching circuit 97, etc.
is the memory 9 based on the address signal in the header signal.
The pixel data in the digital video signal supplied to the circuit 4 or 95 is written to a predetermined address, but the header signal and EOD signal are controlled not to be written. The switch circuit 88 is switched to terminal a or b by a control signal from the control circuit 90 based on the memory write designation code in the header signal, and supplies the digital video signal to the memory 94 or 95 designated by the memory write designation code. .

The memories 94 and 95 simultaneously read out the written reproduction pixel data based on the read control signal from the memory read controller and synchronization signal generation circuit 96, and also correct jitter associated with reproduction. Here, the memory 94
The digital luminance signal read out from 95 and 95 is read out at a sampling frequency of 9MH7 and an I quantization number of 8 bits,
The first and second digital color difference signals are each read out at a sampling frequency of 2.25 MHz and a quantization number of 8 bits, and are supplied to a switching circuit 97.

If the memories 94 and 95 are frame memories, they each have a configuration using, for example, 48 (-6×8) 64k RAMs, and the four pixel data of the digital luminance signal and two types of digital color difference data are stored at the same address. Each one pixel data of the signal is written respectively. Here, the address signals 218 to 24a (or 2
1b to 24b) indicate address numbers that increase by 1 for each total of 6 pixel data consisting of 4 pixel data of the digital luminance signal and 1 pixel data of each of the 2 types of digital color difference signals. , here the address signal 23a
, 24a (or 23b, 24b), the pixel data of the first scanning line of the first field is sequentially written to the designated address of the memory 94 or 95 in units of six pixel data. , the pixel data of the first scanning line of the second field is sequentially written to the specified address in units of six pixel data.

Thereafter, the same operation as above is repeated. In this way, writing is performed in the memory 94 or 95 within the horizontal blanking period, and pixel data for a total of one frame or one field (two fields worth of pixel data) is written. .

The memories 94 and 95 simultaneously read out six pixel data at the same address within a video period in which image information is transmitted by a read control signal from a memory read controller and a synchronization signal generation circuit 96. The switching circuit 97 selects and outputs only the read pixel data of the memory 94 or 95 designated by the read designation code "B19R" in the header signal. In addition, the switching circuit 97 switches from one of the memories 94 and 95, which had been selectively outputting the readout output, to the readout output of the other memory in response to a switching control signal supplied when the EOD signal is detected. The time required for switching the switching circuit 97 is normally extremely short, but when a special effect such as a fade-in is produced, the switching is performed gradually over a certain period of time (for example, 1 second).

Of the three types of digital signals that passed through the switching circuit 97,
The digital luminance signal is converted into an analog luminance signal by the OA converter 98 and supplied to the encoder 101, and the two types of digital color difference signals are converted into digital signals by the DA converters 99 and 100, respectively.
Analog converted color difference signals (B-Y) and (R-Y)
It is then supplied to the n-der 101. encoder 1
01 is NTS from these three types of analog signals, horizontal synchronization signal, vertical synchronization signal, color burst signal, etc. from the memory read controller and synchronization signal generation circuit 96.
A color video signal compliant with C format is generated and a color television image for monitor is received from the playback output terminal 102 *<
(not shown), where output terminal 84.85.86
Color still images, partial moving images, etc. are displayed as supplementary information for the listener's music appreciation of the audio signal outputted and reproduced from the audio signal.

By the way, the music program and the color image played from the disk 40 need to be played in synchronization with each other, but the pixel data of one frame (or one field) stored in the memory 94.95 is Since it takes a certain amount of time to memorize the image, it is necessary to record the digital video signal for the specified period of time before the start of displaying the image. The latter is recorded ahead of the recording start position of the digital video signal by the predetermined period of time. Therefore, when randomly accessing the disc 40, the playback unit 74 is moved at high speed toward the inner or outer circumference of the disc 40, and the control signal in the signal format shown in FIG. When the desired music program reaches the beginning position, playback in an arbitrary mode such as normal playback is started from there, but in such a case, playback may start from the middle of the digital video signal. In such a case, in the method previously proposed by the applicant, the synchronization signal existed only at the first position of the digital video signal of one field or one frame of the image, so the digital video signal reproduced from the middle of the above Although it was not possible to display the video signal, according to this embodiment, as shown in FIG.
Since it is placed and transmitted before the 1-minute digital video signal section, even if it is played from the middle, the memory 9 of the digital video signal after the first played header part is stored.
4 or 95 and display it.

Furthermore, when displaying lyrics or the like on a portion of the screen, if the image information of only that portion is transmitted in a concentrated manner, that portion can be quickly changed. Similarly, you can also play videos on a limited small screen area of the screen. That is, a limited small screen portion 106 within the playback screen 104 shown in FIG.
When playing a video, address signals 21a to 24a and 21b to specify the address of this small screen portion 106.
The process of transmitting the pixel data following the header part having 24b is repeated. In FIG. 13, 105 indicates the transmission position of a part of the header. However, as described above, this header part 105 is not displayed on the screen 104. Since the pixel data of the small screen portion 106 is written to the memory of the memory 94 and 95 that is reading the digital video signal displaying the image on the screen 104,
The written pixel data is displayed as a moving image in the small screen portion 106
will be displayed.

In the case of partial image transmission, the transmission time varies depending on the display area, so the transmission period is short for images displayed on a small screen.
It can be a video. In this case, the digital video signal transmitted following the header part is divided into one unit consisting of pixel data of four digital luminance signals and one pixel data each of two types of digital color difference signals. , so that the first part of the unit is transmitted first.

Furthermore, even if the digital video signal supplied to the memory 94, 95 deviates by one word for some reason, it is corrected by reproducing part of the next header, and errors due to the time lag of words are not accumulated.

Note that the unit of division of the digital video signal recorded on the disk 40 by the method of the present invention is not limited to the above-mentioned embodiments, but in short, the unit of division of the digital video signal recorded on the disk 40 by the method of the present invention is not limited to the above-mentioned embodiment. In such cases, it is so inexpensive that the human eye does not perceive that the color and brightness are being switched separately. For example, it is possible to collect pixel data with a maximum of 10 scanning lines and add a part of the header to it. 1°). In addition, the digital video signal is divided into channels Ch-3 and Ch-4 shown in FIG. 8 for one frame or one field.
In this case, the reproduced digital video signals of the two channels are reproduced in time series and transmitted through one transmission line.

Further, in the above embodiment, the number of scanning lines of the video signal is 625.
The signal distribution format of digital audio discs such as Disc 40 is common throughout the world, so that it can be played universally, and it is possible to play back in the PAL format or SECA format.
This is to ensure that there is no shortage of information when reproducing a video signal compliant with the M format.

Further, in the above explanation, the case where the application is applied to the disc recording method and playback device proposed earlier by the present applicant has been explained, but it is not limited to this (e.g., a capacitance change reading type having a tracking guide groove). The present invention can also be applied to discs and discs on which previously recorded signals are read by a light beam.Also, the present invention can be applied to a television receiver with R, G,
If it has three primary color signal input terminals of B, encoder 1
01 is replaced by a matrix circuit, which converts the luminance signal Y and color difference signals (RY) and (B-Y) into three primary color signals R, G, and B, and supplies them to the above input terminals separately. This allows the television receiver to display extremely high quality still images. Furthermore, the color difference signals recorded on the disk 4o are (G-Y) and (
It may be a combination with R-Y) or (B-Y) (or even I
signal.

A Q signal may be used (or a three primary color signal may be used.

As mentioned above, the digital signal recording method according to the present invention is
Each pixel data of a digital video signal is composed of a Σ-scaled number of the data of one sample point of the digital audio signal, and the pixel data of the same sample point of two adjacent scanning lines are Since people record the data by placing them in the same word that is transmitted in a period equal to the data transmission period of one sample point of the digital audio signal, when this recording medium is played back, what is the played digital video signal? When performing scanning line number conversion on digital video signals of different scanning line number systems for playback, the scanning line number conversion can be performed easily, and the digital video signal can be reproduced with high quality as well as with a high quality playback name of the digital audio signal. It has features such as being able to reproduce reproduced images with high quality.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the main part of the method of the present invention, Fig. 2 is a diagram showing the image information portion to be transmitted in a video signal, and Fig. 3 is a diagram showing the image information portion recorded by the method of the present invention. FIG. 4 is a diagram schematically showing an example of the structure of one frame of a digital video signal, FIG. 4 is a diagram showing an example of the signal format of the header signal in FIG. 3, and FIG. 3 is a diagram showing an example of the signal format of the video signal section, and FIGS. 6(A) and 6(B) are diagrams showing an example of a method for converting the number of scanning lines from 625 to 525, respectively. , FIG. 7 is a diagram showing an embodiment of another essential part of the system of the present invention, and FIG. 8 is a diagram showing an example of a one-block signal format previously proposed by the applicant to which the system of the present invention can be applied. , FIG. 9 is a diagram showing an example of the signal format of the control signal in FIG. 8, FIG. 10 is a system diagram showing an example of the recording device in FIG. 7, and FIG. 11 is an example of the digital signal reproducing equipment 12 is a partially enlarged perspective view showing an example of the sliding situation between the playback needle and the disc-shaped recording medium in FIG. 11, and FIG. 13 is an explanation of the screen rewriting operation in a limited small screen. This is a diagram. 1... Video signal source, 2... TV synchronization signal generator,
3... Matrix circuit, 4.5.6.35... AD
Converter, 9, 10.11.18.94.95... Memory, 15.97... Switching circuit, 17... Header signal generator, 19... Digital recorder, 20.25
...Synchronization signal, 21a to 24a, 21b to 24
b...address signal, 30-32...analog audio signal input terminal, 36...control signal generation circuit,
37... Signal processing circuit, 39... Recording device, 40...
...Disc-shaped recording medium (disc), 41...Laser light source, 42°45.47...Light modulator, 49...Recording master, 59...Polarizing prism, 60...Half mirror-161 ... Prism, 74... Regeneration needle, 74a
...electrode, 76...permanent magnet, 79...tracking servo circuit, 80...pickup circuit, 83...
...Decoder, 84-86...Analog audio signal output terminal, 87...Scanning line number conversion circuit, 88...
Switch circuit, 89... Synchronous signal detection circuit, 90...
・Control circuit, 91...Header signal detection circuit, 93・
・Input terminal for inner product designation signal, etc., 98 to 100...OA
Converter, 101...1 encoder, 102...analog video signal output terminal, 106...small screen portion to be rewritten, Hl, 1]2...part of header, ■1
~V286...Video signal section, EOD...Signal transmission end signal (EOD signal). Figure 2 Figure 13 Figure 7 Figure 16 Figure S Figure 9 Figure 1 O Continued from page -1 0 Inventor Fujio Suzuki 3-12 Moriyamachi, Kanayō-ku, Yokohama City Victor Company of Japan 0 Inventor Person: Koji Tanaka, 3-12 Moriyamachi, Kanayō-ku, Yokohama City, Japan Victor Co., Ltd., 0 persons. Author: Mitsuo Kubo, 3-12 Moriyamachi, Kanayō-ku, Yokohama City, Japan Victor Co., Ltd., 0 persons. Person: Yoshiaki Amano, Kana, Yokohama City. Within Japan Victor Co., Ltd., 3-12 Moriyamachi, Yokohama City 0 Inventor: Hikaru Kikuchi, within Japan Victor Co., Ltd., 3-12 Moriyamachi, Kanayō-ku, Yokohama City

Claims (1)

[Claims] (1) Convert the analog video signal of the image information to be recorded into digital pulses to generate a digital video signal that is a time-series composite signal of pixel data from each pixel forming one screen, and In a digital signal recording method in which a digital audio signal is generated by digital pulse modulation of an analog audio signal of audio information, and the digital video signal and the digital audio signal are respectively synthesized in time series and recorded on a recording medium, the digital video signal is Each pixel data is composed of the quantization number of τ of the data at one point of the digital audio/audio signal, and the pixel data at the same sample point in two adjacent runs 1E# is A digital signal recording method characterized in that recording is performed by arranging and recording each of the above in the same word transmitted in a period equal to the data transmission period of one sample point of the digital audio signal. ■ The two adjacent scanning lines are at 9i in the first field.
2. The digital signal recording system according to claim 1, characterized in that there are n scanning lines (where n is a positive integer) and an n-th scanning line of the second field. (2) The two adjacent scanning lines are the 21-1st scanning line (however, dawn is a positive integer) and the 2nd-scanning line in the same field, as described in claim 1. digital signal recording method.